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  • 安卓第四周作业

    1.九宫格

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <Button
            android:id="@+id/button1"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#673AB7"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button2"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#8BC34A"
            android:layout_toLeftOf="@id/button1"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button3"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#8BC34A"
            android:layout_toRightOf="@id/button1"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button4"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#2196F3"
            android:layout_above="@id/button1"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button5"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#9C27B0"
            android:layout_toLeftOf="@+id/button4"
            android:layout_above="@id/button2"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button6"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#9C27B0"
            android:layout_toRightOf="@+id/button4"
            android:layout_above="@id/button3"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button7"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#2196F3"
            android:layout_below="@id/button1"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button8"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#9C27B0"
            android:layout_below="@id/button2"
            android:layout_toLeftOf="@id/button7"
            android:layout_centerInParent="true"
            android:text=""
            />
        <Button
            android:id="@+id/button9"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="#9C27B0"
            android:layout_toRightOf="@+id/button4"
            android:layout_below="@id/button3"
            android:layout_centerInParent="true"
            android:text=""
            />
    
    
    </RelativeLayout>

    2.登录界面

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#3424"
        >
    
        <ImageView
            android:id="@+id/img1"
            android:layout_width="90dp"
            android:layout_height="90dp"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="60dp"
            app:srcCompat="@mipmap/ic_launcher_round"></ImageView>
        <TextView
            android:id="@+id/tv1"
            android:layout_width="90dp"
            android:layout_height="50dp"
            android:layout_marginTop="60dp"
            android:layout_below="@id/img1"
            android:layout_toLeftOf="@id/et1"
            android:text="用户名:"
            android:textSize="20dp"
            ></TextView>
        <EditText
            android:id="@+id/et1"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:layout_marginTop="60dp"
            android:layout_centerHorizontal="true"
            android:layout_below="@id/img1"
            android:background="@android:drawable/edit_text"
            ></EditText>
        <TextView
            android:id="@+id/tv2"
            android:layout_width="90dp"
            android:layout_height="50dp"
            android:layout_marginTop="60dp"
            android:layout_below="@id/tv1"
            android:layout_toLeftOf="@id/et1"
            android:text="密码:"
            android:textSize="20dp"
            ></TextView>
        <EditText
            android:id="@+id/et2"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:layout_marginTop="60dp"
            android:layout_centerHorizontal="true"
            android:layout_below="@id/et1"
            android:background="@android:drawable/edit_text"
            ></EditText>
        <Button
            android:id="@+id/button1"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_centerHorizontal="true"
            android:layout_below="@id/et2"
            android:text="登录"
            android:textSize="20dp"
            android:layout_marginTop="50dp"
            ></Button>
    
    </RelativeLayout>
    package com.example.myapplication;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.Toast;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Button button=(Button)findViewById(R.id.button1) ;
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(MainActivity.this,"按钮点击",Toast.LENGTH_SHORT).show();
                }
            });
        }
    }

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  • 原文地址:https://www.cnblogs.com/LILY321/p/13697841.html
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